mcpublic writes: iRobot veteran and Roomba co-inventor, Joe Jones is a modest man with a big mission: to create robots that make agriculture more efficient, less tedious, and yes, maybe even one day feed the world. After a decade at Harvest Automation building greenhouse robots, his new team at Franklin Robotics has developed Tertill, an affordable, waterproof, solar-powered robot that continuously whacks weeds around your yard. MIT Technology Review calls Tertill “a Roomba for your garden.” Today the Kickstarter campaign went live and already they are well on the way to their goal. According to the Kickstarter campaign, Tertill is solar powered, chemical free, waterproof and Bluetooth compatible. It doesn’t actually pull the weeds from your garden, instead it uses a “spinning string trimmer” to trim the weeds down to ground level. Since Tertill will be trimming weeds daily, the company says the weeds will eventually run out of nutrients to continue growing, and therefore will die and decompose. How does it know what’s a weed and what’s a plant? “A plant tall enough to touch the front of Tertill’s shell activates a sensor that makes the robot turn away. A plant short enough to pass under Tertill’s shell, though, activates a different sensor that turns on the weed cutter. Because Tertill’s approach is height-based, put one of the provided plant collars around short plants until they are tall enough for Tertill to recognize. When Tertill approaches the collar, it will recognize it and turn away.”